Day after pill effectiveness

I had unprotected sex 3 days in a row and he ejaculated inside me. I drank the pill 3 days after the last time. I had also taken the day after pill on December and January. My period is very late. I am currently on day 43 of my cycle. The longest cycle I have had was of 46 days but days before drinking the pill I was sure I would get my period soon as I had very sore breasts and cramps, but then the symptoms all went away without a period. Now I have very bad cramps but sill no period. It has been 1 week and 2 days since I took it with my period being about 8 days late.  I also hear stories where pregnant women experience cramps some bad and some mild. Could I be pregnant?